The Yanamamo and Nap Chagnon with Ray Hames

Hosts Dave Pietraszewski and David Pinsof, joined by co-host Zach Garfield, introduce guest Ray Hames, a professor emeritus at the University of Nebraska-Lincoln. They discuss his pioneering contributions to the early wave of human behavioral ecology, his methodological expertise in time allocation data, and his extensive career studying subsistence-based communities.

Ray Hames reflects on the challenges and controversies of applying mathematical models from evolutionary biology during the early days of human behavioral ecology. The speakers discuss early criticisms, the legacy of E.O. Wilson's sociobiology, and how oversimplified genetic determinism contrasted with flexible behavioral ecology models like optimal foraging theory.

Dave Pietraszewski and David Pinsof discuss with Ray Hames whether human behavioral ecology ignored psychology, exploring the phenotypic gambit, the shift toward a hypothetico-deductive framework inspired by economics, and the rejection of group selection models.

Ray Hames discusses balancing quantitative data collection with qualitative ethnographic insights in anthropology, noting the influence of mentors like Nap Chagnon and the practical challenges of learning indigenous languages in the field.

Dave Pietraszewski, David Pinsof, and guest Ray Hames discuss Hames's early experiences traveling to Yanomamo territory without modern communication tools, navigating initial isolation, and interacting with the community. They talk about dealing with playful or aggressive threats, learning the local language, and finding psychological comfort within the village compared to urban resupply trips.

The speakers discuss what a typical day of data collection looked like in the village, including tracking foraging and hunting trips, conducting behavioral observations, recording kinship data, and using paper and carbon sheets for time allocation studies. They also share practical advice from Napoleon Chagnon regarding equipment, clothing preservation, and field logistics in remote tropical environments.

Dave Pietraszewski, David Pinsof, and Ray Hames discuss Napoleon Chagnon's larger-than-life personality in the field, his integration with the Yanomamo, and the extensive skills required for jungle hunting compared to Western methods. Hames attributes Chagnon's success and local respect to his outgoing nature, generosity, and sharp shooting ability.

Ray Hames shares his experiences presenting research at academic conferences, noting a growing hostility toward scientific and evolutionary approaches within the American Anthropological Association. He and the hosts discuss how organizations like the Human Behavior and Evolution Society provided a much more welcoming intellectual home for empirical anthropological work.

Ray Hames discusses with the hosts the difficulties of applying standard Western psychological questionnaires and concepts like depression to indigenous populations such as the Yanomamo. They examine how translation issues, intermediary languages, and cultural conditioning introduce noise into research, while also highlighting the social capital risks anthropologists face when asking intrusive personal questions.

Ray Hames and the hosts explore public and scientific representations of indigenous peoples, addressing the persistent Rousseauian myth of the ecologically noble savage. Hames explains how political advocacy often creates hypocrisy regarding violence and environmental stewardship among tribal populations, and details how resource conservation actually functions under specific hierarchical and local market conditions in the Pacific.

Dave Pietraszewski, David Pinsof, and guest Ray Hames discuss intergenerational resource transfers, contrasting the role of elders in hunter-gatherer societies where they are valued repositories of wisdom with modern Western societies where older individuals are often viewed as economic costs.

The speakers explore homosexuality as an evolutionary mystery from a Darwinian perspective, discussing how cultural expectations around marriage, reproduction, and female sexual fluidity relate to relaxed selection pressures on heterosexuality.

Host Dave Pietraszewski, David Pinsof, and guest Ray Hames discuss how social norms regarding fertility and patriarchy influence sexual orientation and gender variation across different societies. They explore cross-cultural documentation of third and fourth genders, noting how behavior and preference are disentangled within diverse social systems.

The speakers examine evolutionary puzzles surrounding sexual orientation, specifically how traits leading to zero direct fitness persist. They discuss Ray Blanchard's birth order model and fraternal birth order effects as a promising biological mechanism related to prenatal androgenization, alongside classic literature recommendations in evolutionary behavioral sciences.

Ray Hames, Dave Pietraszewski, and David Pinsof discuss foundational scholarly influences in behavioral ecology and evolutionary anthropology, including Richard Alexander and Don Simons, reflecting on graduate school experiences, academic mentorship, and the history of evolutionary approaches to human behavior at institutions like UCSB and Berkeley.

The speakers discuss the controversy surrounding Napoleon Chagnon and the book Darkness in El Dorado, characterizing it as a heavily flawed hit job driven by opposition to evolutionary approaches and Chagnon's findings on warfare, while highlighting the actual humanitarian vaccination efforts during the measles epidemic.

Host Dave Pietraszewski and guests thank Ray Hames for his extensive contributions to evolutionary anthropology. They discuss the impact of his teaching and mentorship at the University of Nebraska, noting his commanding classroom presence and the inspiration he provided to a new generation of evolutionary scientists.

Hosts Dave Pietraszewski and David Pinsof wrap up the episode by encouraging listeners to leave reviews, share the podcast via social media or word of mouth, and support them on Patreon, concluding with a lighthearted chat about music and 'vibes'.